jQuery validator plugin之Plugin Method

原文

.validate()

• validate( [options ] )

  • options
    Type: Object
    • debug (default: false)
      Type: Boolean
      Enables debug mode. If true, the form is not submitted and certain errors are displayed on the console (will check if a window.console property exists). Try to enable when a form is just submitted instead of validation stopping the submit.
    • submitHandler (default: native form submit)
      Type: Function()
      Callback for handling the actual submit when the form is valid. Gets the form and the submit event as the only arguments. Replaces the default submit. The right place to submit a form via Ajax after it is validated.
      • form
        Type: Element
        The form currently being validated, as a DOMElement.
      • event
        Type: Event
        The submit event instance.
    • invalidHandler
      Type: Function()
      Callback for custom code when an invalid form is submitted. Called with an event object as the first argument, and the validator as the second.
      • event
        Type: Event
        A custom event object, since this function is bound as an event handler.
      • validator
        Type: Validator
        The validator instance for the current form.
    • ignore (default: ":hidden")
      Type: Selector
      Elements to ignore when validating, simply filtering them out. jQuery's not-method is used, therefore everything that is accepted by not() can be passed as this option. Inputs of type submit and reset are always ignored, so are disabled elements.
    • rules (default: rules are read from markup (classes, attributes, data))
      Type: Object
      Key/value pairs defining custom rules. Key is the name of an element (or a group of checkboxes/radio buttons), value is an object consisting of rule/parameter pairs or a plain String. Can be combined with class/attribute/data rules. Each rule can be specified as having a depends-property to apply the rule only in certain conditions. See the second example below for details.
    • messages (default: the default message for the method used)
      Type: Object
      Key/value pairs defining custom messages. Key is the name of an element, value the message to display for that element. Instead of a plain message, another map with specific messages for each rule can be used. Overrides the title attribute of an element or the default message for the method (in that order). Each message can be a String or a Callback. The callback is called in the scope of the validator, with the rule's parameters as the first argument and the element as the second, and must return a String to display as the message.
    • groups
      Type: Object
      Specify grouping of error messages. A group consists of an arbitrary group name as the key and a space separated list of element names as the value. Use errorPlacement to control where the group message is placed.
    • normalizer
      Type: Function()
      Prepares/transforms the elements value for validation.
      See normalizer docs for more details. 
    • onsubmit (default: true)
      Type: Boolean
      Validate the form on submit. Set to false to use only other events for validation.
    • onfocusout
      Type: Boolean or Function()
      Validate elements (except checkboxes/radio buttons) on blur. If nothing is entered, all rules are skipped, except when the field was already marked as invalid.
      • element
        Type: Element
        The element currently being validated, as a DOMElement.
      • event
        Type: Event
        The event object for this focusout event.
    • onkeyup
      Type: Boolean or Function()
      Validate elements on keyup. As long as the field is not marked as invalid, nothing happens. Otherwise, all rules are checked on each key up event. Set to false to disable.
      • element
        Type: Element
        The element currently being validated, as a DOMElement.
      • event
        Type: Event
        The event object for this keyup event.

• • • onclick

　　     Type: Boolean or Function()

　　     Validate checkboxes, radio buttons, and select elements on click. Set to false to disable.

• • element
    Type: Element
    The element currently being validated, as a DOMElement.
  • event
    Type: Event
    The event object for this click event.

• focusInvalid (default: true)

　　Type: Boolean

　　Focus the last active or first invalid element on submit via validator.focusInvalid(). The last active element is the one that had focus when the form  was submitted, 　　avoiding stealing its focus. If there was no element focused, the first one in the form gets it, unless this option is turned off.

• focusCleanup (default: false)
  Type: Boolean
  If enabled, removes the errorClass from the invalid elements and hides all error messages whenever the element is focused. Avoid combination with focusInvalid.
• errorClass (default: "error")
  Type: String
  Use this class to create error labels, to look for existing error labels and to add it to invalid elements.
• validClass (default: "valid")
  Type: String
  This class is added to an element after it was validated and considered valid.
• errorElement (default: "label")
  Type: String
  Use this element type to create error messages and to look for existing error messages. The default, "label", has the advantage of creating a meaningful link between error message and invalid field using the for attribute (which is always used, regardless of element type).
• wrapper (default: window)
  Type: String
  Wrap error labels with the specified element. Useful in combination with errorLabelContainer to create a list of error messages.
• errorLabelContainer
  Type: Selector
  Hide and show this container when validating.
• errorContainer
  Type: Selector
  Hide and show this container when validating.
• showErrors
  Type: Function()
  A custom message display handler. Gets the map of errors as the first argument and an array of errors as the second, called in the context of the validator object. The arguments contain only those elements currently validated, which can be a single element when doing validation on focusout or keyup. You can trigger (in addition to your own messages) the default behaviour by calling this.defaultShowErrors().
  • errorMap
    Type: Object
    Key/value pairs, where the key refers to the name of an input field, values the message to be displayed for that input.
  • errorList
    Type: Array
    An array for all currently validated elements. Contains objects with the following two properties:
    • message
      Type: String
      The message to be displayed for an input.
    • element
      Type: Element
      The DOMElement for this entry.
• errorPlacement (default: Places the error label after the invalid element)
  Type: Function()
  Customize placement of created error labels. First argument: The created error label as a jQuery object. Second argument: The invalid element as a jQuery object.
  • element
    Type: jQuery
    The validated input, for relative positioning.
  • error
    Type: jQuery
    The error label to insert into the DOM.
• success
  Type: String or Function()
  If specified, the error label is displayed to show a valid element. If a String is given, it is added as a class to the label. If a Function is given, it is called with the label (as a jQuery object) and the validated input (as a DOM element). The label can be used to add a text like "ok!".
  • label
    Type: jQuery
    The error label. Use to add a class or replace the text content.
  • element
    Type: Element
    The element currently being validated, as a DOMElement.
• highlight (default: Adds errorClass (see the option) to the element)
  Type: Function()
  How to highlight invalid fields. Override to decide which fields and how to highlight.
  • element
    Type: Element
    The invalid DOM element, usually an input.
  • errorClass
    Type: String
    Current value of the errorClass option.
  • validClass
    Type: String
    Current value of the validClass option.
• unhighlight (default: Removes the errorClass)
  Type: Function()
  Called to revert changes made by option highlight, same arguments as highlight. 
• ignoreTitle (default: false)
  Type: Boolean
  Set to skip reading messages from the title attribute, helps to avoid issues with Google Toolbar; default is false for compability, the message-from-title is likely to be completely removed in a future release.

This method sets up event handlers for submit, focus, keyup, blur and click to trigger validation of the entire form or individual elements.

Each one can be disabled, see the onxxx options (onsubmit, onfocusout, onkeyup, onclick).

focusInvalid focuses elements when submitting an invalid form.

Use the debug option to ease setting up validation rules, it always prevents the default submit, even when script errors occur.

Use submitHandler to implement your own form submit, eg. via Ajax.

Use invalidHandler to react when an invalid form is submitted.

Use rules and messages to specify which elements to validate, and how.

See rules() for more details about specifying validation rules.

Use errorClass, errorElement, wrapper, errorLabelContainer, errorContainer, showErrors, success, errorPlacement, highlight, unhighlight, and ignoreTitle to control how invalid elements and error messages are displayed.

.valid()

Checks whether the selected form is valid or whether all selected elements are valid.

.rules()

Read, add and remove rules for an element.

• rules()

• rules( "add", rules )

  • "add"
    Type: String
  • rules
    Type: Object
    The rules to add. Accepts the same format as the rules-option of the validate-method

• rules( "remove", rules )

  • "remove"
    Type: String
  • rules
    Type: Object
    The space-seperated names of rules to remove and return. If left
    unspecified, removes and returns all rules. Manipulates only rules
    specified via rules-option or via rules("add").

Returns the validations rules for the first selected element or Adds the specified rules and returns all rules for the first matched element

Requires that the parent form is validated,

that is, $( "form" ).validate() is called first or Removes the specified rules and returns all rules for the first matched element.

There are several ways to specify validation rules.

• Validation methods with parameters can be specified as attributes (recommended)
• Validation methods without parameters can be specified as classes on the element
• Both can be specified using the rules-option of the validate()-method
• Both rules and messages can be specified using data attributes, using data-msg (a generic, not-method specific message), data-msg-[method] and data-rule-[method].

When setting, the rules can also contain a messages-object, specifying custom messages for existing or added rules.

• rules
  Type: Object
  The rules to add. Accepts the same format as the rules-option of the validate-method.